On the technological side of things, you’re pretty much fucked no matter what. Virtually all car companies now have proprietary app integrations, partnerships with Google and Apple, and other anti-privacy features.

Some practical things you can do-

Opt out of as much data collection and sharing as you can. Read the manual and menu dive to disable optional features you don’t need.

If you finance or lease from the dealer, there are likely additional data disclosures and third party sharing that you can opt out of. Read all the paperwork when you sign your purchase or lease documents. In my case I had to literally fill out and mail something in (they don’t want it to be easy to opt-out because they make money from sharing the data with third parties).

I like the idea, but don’t just buy these assuming you’re good to go, and then walk around with a normie iPhone or Android device that phones home constantly with your precise location and device ID, SIM information etc.

There is always at least some error rate and deniability in probabilistic matching by something like facial recognition. There is a lot less deniability of your specific device ID, tied to your real identity (thanks to KYC laws), being in X location at Y time.